The diagrams show your network and the encrypt rule. If the source and destination are inside the VPN Domain of the same gateway i.e. Source X is in Net_A and Destination Y is in Net_B. The connection originates at X and reaches the gateway, which forwards the response back to Y.

Which of the following is true?

A.
The connection from Net_A to Net_B will be authenticated

B.
The gateway 1 will need authentication

C.
The connection from Net_A to Net_B will not be encrypted

D.
The gateway 1 will drops the connection from Net_A to Net_B

E.
The connection from Net_A to Net_B will be encrypted